Subject(s): Catholic Church -- Doctrines -- Papal documents. | Catholic Church. | Holiness -- Papal documents. | Perfection -- Religious aspects -- Catholic Church. | Christian life -- Catholic authors. | Spiritual life -- Catholic Church -- Papal documents. | Spirituality -- Catholic Church -- Papal documents. | Apostolic exhortations (Papal letters) | Church and social problems -- Catholic Church -- Papal documents. | Apostolic exhortations (Papal letters) | Christian life -- Catholic authors. | Church and social problems -- Catholic Church. | Holiness. | Perfection -- Religious aspects -- Catholic Church. | Spiritual life -- Catholic Church. | Spirituality -- Catholic Church. | Theology, Doctrinal. | Papal documents. | Papal documents.